Calibration Exercise of Fixed-Free Resonant Column Apparatus

Shinde, NS and Kumar, J (2021) Calibration Exercise of Fixed-Free Resonant Column Apparatus. In: 7th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics, ICRAGEE 2020, 13-16 Jul 2020, Bengaluru, pp. 35-42.

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Abstract

In this paper, the conventional calibration exercise for resonant column apparatus has been re-examined and some recommendations were provided to improve the accuracy of the test results. During the testing, specimen is assumed to be fixed at bottom and dynamic torsional vibrations are applied at the top using drive system consisting of four magnets. Due to complicated geometry of the drive system, its mass polar moment of inertia (Jd) is found to be difficult to estimate. So, calibration exercise is performed to determine Jd. In this present study, calibration rods of aluminum of known stiffness were used. The diameter of each aluminum rod was varied from 8 to 15 mm and keeping the constant height of 100 mm. The study revealed that the mass polar moment of inertia of the resonant column system is frequency dependent. Also, the solid cylindrical sand specimens were tested using resonant column tests and bender elements tests with varying confining pressure and relative density. © 2021, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

Item Type:	Conference Paper
Publication:	Lecture Notes in Civil Engineering
Publisher:	Springer Science and Business Media Deutschland GmbH
Additional Information:	The copyright for this article belongs to Springer Science and Business Media Deutschland GmbH
Keywords:	Aluminum; Earthquake engineering; Geotechnical engineering; Soil mechanics; Vibrations (mechanical), Complicated geometry; Confining pressures; Frequency dependent; Polar moment of inertias; Relative density; Resonant column apparatus; Resonant column tests; Torsional vibration, Calibration
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	25 Aug 2021 11:56
Last Modified:	26 Aug 2021 05:41
URI:	http://eprints.iisc.ac.in/id/eprint/69366

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